109897930821 has 8 divisors (see below), whose sum is σ = 167463513664. Its totient is φ = 62798817600.

The previous prime is 109897930757. The next prime is 109897930937. The reversal of 109897930821 is 128039798901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109897930821 - 2⁶ = 109897930757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109897932821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2616617380 + ... + 2616617421.

It is an arithmetic number, because the mean of its divisors is an integer number (20932939208).

Almost surely, 2^109897930821 is an apocalyptic number.

It is an amenable number.

109897930821 is a deficient number, since it is larger than the sum of its proper divisors (57565582843).

109897930821 is an equidigital number, since it uses as much as digits as its factorization.

109897930821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233234811.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 109897930821 in words is "one hundred nine billion, eight hundred ninety-seven million, nine hundred thirty thousand, eight hundred twenty-one".